Febby Ardhia, Rizal Ahmad Fauzi, and Dinar Dinangsit. “The Effect of Predictable and Unpredictable Training on the Speed of Footwork in Badminton”. Kinestetik : Jurnal Ilmiah Pendidikan Jasmani, vol. 6, no. 4, Dec. 2022, pp. 731-6, doi:10.33369/jk.v6i4.25561.